Rename BluetoothHandsfreeClient to BluetoothHeadsetClient

This makes our terminology consistent with the existing BluetoothHeadset profile

Also updated arguments to Context.bindService()

Change-Id: I27cc5a6fde256b1f5dccca53a7a15ec8f58691c2
diff --git a/Android.mk b/Android.mk
index 85ed902..a1e9147 100644
--- a/Android.mk
+++ b/Android.mk
@@ -110,7 +110,7 @@
 	core/java/android/bluetooth/IBluetoothPbap.aidl \
 	core/java/android/bluetooth/IBluetoothMap.aidl \
 	core/java/android/bluetooth/IBluetoothStateChangeCallback.aidl \
-	core/java/android/bluetooth/IBluetoothHandsfreeClient.aidl \
+	core/java/android/bluetooth/IBluetoothHeadsetClient.aidl \
 	core/java/android/bluetooth/IBluetoothGatt.aidl \
 	core/java/android/bluetooth/IBluetoothGattCallback.aidl \
 	core/java/android/bluetooth/IBluetoothGattServerCallback.aidl \